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Finding the Third Proportional to 668 and 726.50

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Solution

The third proportional to 668 and 726.50 is: 790.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    668 : 726.50 = 726.50 : x
  2. Step 2: Convert to fraction form
    668/726.50 = 726.50/x
  3. Step 3: Cross multiply
    668x = 726.50 × 726.50
  4. Step 4: Simplify right side
    668x = 527,802.25
  5. Step 5: Solve for x
    x = 527,802.25/668
  6. Step 6: Final answer
    x = 790.12

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.